split kernel into 2 stages; second stage gets copied to 0x0 and runs from there

1 files changed, 46 insertions, 9 deletions

diff --git a/interrupts.c b/interrupts.c
index 6952f89..1b0590a 100644
--- a/interrupts.c
+++ b/interrupts.c
@@ -1,10 +1,20 @@
 #include "uart.h"
-/**
-    @brief The undefined instruction interrupt handler
 
-    If an undefined instruction is encountered, the CPU will start
-    executing this function. Just trap here as a debug solution.
-*/
+void setup(void);
+
+void reset_handler(void)
+{
+  static _Bool setup_done;
+  
+  if (!setup_done)
+    setup();
+
+  setup_done = 1;
+
+  // TODO do something here
+  while(1);
+}
+
 void
 __attribute__((interrupt("UNDEF")))
 __attribute__((section(".interrupts.text")))
@@ -17,13 +27,40 @@ undefined_instruction_vector(void)
     }
 }
 
-void __attribute__((section(".interrupts.data")))
-(*system_reentry_point) (void);
+void supervisor_call_handler(void)
+{
+  uart_puts("something svc happened\n\r");
+
+  while(1);
+}
 
 void
 __attribute__((interrupt("ABORT")))
-__attribute__((section(".interrupts.text")))
 abort_handler(void)
 {
-  system_reentry_point();
+  uart_puts("re-entered system\n\r");
+
+  while(1);
+}
+
+void generic_handler(void)
+{
+  uart_puts("something weird happened\n\r");
+
+  while(1);
+}
+
+void irq_handler(void)
+{
+  uart_puts("irq happened\n\r");
+
+  while(1);
+}
+
+void fiq_handler(void)
+{
+  uart_puts("fiq happened\n\r");
+
+  while(1);
 }
+